I installed and updated the dygraphs and htmlwidgets packages, but the values are not showing. I used many example code all of them are not showing value plots but only a frame with 0-1 y-axes.
library(dygraphs)
dygraph(nhtemp, main = "New Haven Temperatures", ylab = "Temp (F)")
I expected the result as the example from here http://rstudio.github.io/dygraphs/r-markdown.html
But it only shows a title, y-lab, y-lim(from 0-1), and a 16:00 at the beginning of x-axes.